Novak Djokovic has returned to the Park Hotel detention facility in Melbourne, according to CNN affiliate Nine News. 

The men’s world No. 1 was seen in a white van arriving at the hotel, which is also being used as a detention facility for refugees, after he departed his lawyers’ office on Saturday afternoon. 

On Saturday morning, Djokovic was detained by Australian border authorities, per a court-ordered arrangement decided Friday, after his visa was revoked for the second time by Australia’s immigration minister, Alex Hawke.

He was once again placed in pre-immigration detention, as required under Australian law.

A range of protesters have gathered outside the Park Hotel. Some supporting Djokovic and calling for his release, others speaking out against Australia’s detention system.

During his first round of detention in the hotel, Djokovic had requested to be moved to a “more suitable place of detention that would enable him to train,” according to court documents published January 8.

Djokovic’s appeal hearing for the second cancellation of his visa is expected to take place on Sunday morning at 9:30 am Australia time, CNN affiliate Nine News reported, citing one of the tennis star’s lawyers, Paul Holdenson.